Thromb Haemost 1971; 25(03): 545-554
DOI: 10.1055/s-0038-1654328
Originalarbeiten – Original Articles – Travaux Originaux
Schattauer GmbH

The Evaluation of the Two-Stage Prothrombin Assay

Authors

  • H. C Hemker

    1   Laboratories for Coagulation Biochemistry and Cardiovascular Biochemical Research, Departments of Haematology and Cardiology, University Hospital, Leiden, The Netherlands
  • P. W Hemker

    1   Laboratories for Coagulation Biochemistry and Cardiovascular Biochemical Research, Departments of Haematology and Cardiology, University Hospital, Leiden, The Netherlands
  • K. v. d Torren

    1   Laboratories for Coagulation Biochemistry and Cardiovascular Biochemical Research, Departments of Haematology and Cardiology, University Hospital, Leiden, The Netherlands
  • P. P Devilee

    1   Laboratories for Coagulation Biochemistry and Cardiovascular Biochemical Research, Departments of Haematology and Cardiology, University Hospital, Leiden, The Netherlands
  • W. Th Hermens

    1   Laboratories for Coagulation Biochemistry and Cardiovascular Biochemical Research, Departments of Haematology and Cardiology, University Hospital, Leiden, The Netherlands
  • E. A Loeliger

    1   Laboratories for Coagulation Biochemistry and Cardiovascular Biochemical Research, Departments of Haematology and Cardiology, University Hospital, Leiden, The Netherlands
Further Information

Publication History

Publication Date:
28 June 2018 (online)

Preview

Summary

It is shown that (and why) the traditional ways of evaluating a thrombin generation curve do not give acceptable estimations of the prothrombin content of the sample. An alternative method is shown to meet the requirements better; it consists of drawing the thrombin generation curve on a semi-logarithmic graph, and extrapolating the descending slope to zero time. This gives a thrombin concentration representing the prothrombin concentration of the original sample.